Brake for saw-mill log-carriages



(Model) F. TUXWORTH. Brake for 'Saw Mill Log; Carriages.

No. 237,457. P'atnted-Feb. 8,1881.

U ITED STATES PATENT ()FFICE.

FRANK TUXWOBTH, OF MA NISTEE, MICHIGAN.

BRAKE FOR SAW-M ILL LOG-CARRIAG ES.

SPECIFICATION forming part of Letters Patent No. 237,457, dated February 8, 1881.

Application filed October 14, 1880. (ModeL) To all whom it may concern.-

Be it known that I, FRANK TUXWORTH, of Manistee, Manistee county, Michigan, have in vented a new and useful Brake for Saw-Mill Log-Carriages, (which has not been patented Figure 1 of the drawings is a vertical end view of the brake. Fig. 2 is a side view of the brake applied to the rack-rail of the sawmill log-carriage.

The same letters represent the same parts throughout the drawings.

A, Fig. 1, is the bed-plate of the brake, for attachment to the floor or other environment.

B B are pad-boxes filled with pressed paper exposed edgewise, or other material suitable for braking purposes.

O C are the brake-pads,consisting of pressed paper projecting edgewise, or other material suitable for braking purposes.

D D are braces or abutments, rigid with the bed-plate A, one at each end of the pad-boxes to keep the latter from rocking or swervin g on the pressure being applied.

E E are lugs and pivots on the backs of the pad-boxes for attaching the operating-levers.

F F are operating-levers attached by pivot and lug to the backs of the pad-boxes.

G G are adjustable fulcrums, with pivots for operating-levers, proper set-screws, and bolts for securing the fulcrums to the bed-plate.

H is a connecting-lever, attached by pivot to standard-fulcrum I, and by connecting-rods t0 levers F F, for operating the latter. The long arm of the connecting-lever H should be of sufficient gravity of itself, or be so weighted,

' as to regain its perpendicular position and open the brake on the braking-power being relaxed.

I is a standard-fulcrum. attached rigidly to the bed-plate A, and having pivot for connecting-lever H. l A

J J are set-screws for adjustingthe fulcrums G G. l

K K are bolts for securing fulcrums G Gr when properly adjusted to the bed-plate A.

L, Fig. 2, is the saw-mill carriage.

M is a rack rail or projection of the sawmill carriage, attached firmly thereto and running longitudinally therewith, and passing between the brake-pads G 0.

As will readily be seen by the drawings, when the connecting-lever H is operated by a cord or chain-say extending from the end of its long arm over a pulley to a foot-lever or other power-it, in turn, will operate the levers F F, throwing out their long arms, and bringing their short arms and the attached brake-pads together upon the rack rail or projection M, Fig. 2, thus braking up the motion of the saw-mill log-carriage. When the pressure of the foot or other power is removed the gravity or added weight of the long arm of lever H will bring that lever to a perpendicular position again, bringing in the long arms of levers F F, throwing out their short arms, and thus relaxing the attached brake-pads and relieving the rack rail or projection of the carriage.

What I claim as new and my invention, and desire to secure by Letters Patent,-is

1. A clamp-brake for saw-mill log-carriages, having pad-boxes B B and brake-pads O G, consisting of pressed paper exposed edgewise, substantially as shown and described, and for the purpose set forth.

' 2. A clamp-brake for saw-mill log-carriages, having pad-boxes B B, brake-pads G O, and suitable operating-levers, as F 'F, combined with rail or projection M on saw-mill carriage, as and for the purpose set forth.

3. The brake mechanism for saw-mill logcarriages, consisting, essentially, of the jaws d of the clamp-brake, operatedby suitable levers, as described, and located between the abutments D D, as shown, combined with the rail or projection on the carriage, substantially as shown and described, and for the pur- 5 pose set forth.

4. The combination of the j aws of the clampbrake, working between abutments D D, and

the levers F H, fulcrumed as described, with nections, all operating in combination subthe saw-mill carriage, having a projection, as stantially as shown and described, and for the IO M, substantially as shown and described, and purpose set forth.

for the purpose set forth. Manistee, September 8, 1880.

5. The clamping-jaws pivoted on levers F FRANK TUXWORTH. F, the levers F F, pivoted on sliding blocks or Witnesses:

fulorums G G, which are adjustable by set- WILSON H. GRAY, screws, as shown, and the lever H and its con- GEORGE R. GINMAN. 

